HURRY PLEASEEE Find the circumference of each circle. round to the nearest tenth. use 3.1r or 22/7 for pi A. 15.7 in.
b. 19.6
c. 3.9
d. 7.9 in.​

Ineed with number 6 , explain how to get 1978

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true